In a futile attempt to stop all the carry-on-heroes ( And by posting, I have become part of the problem).
Locking the bins will cause even more delay, because people will stand there burning trying to get their carry-on.
Prosecuting people will do nothing because who will remember jurisprudence while trying to get of an aircraft that is on fire.
I honestly think the only realistic scenario for certification would be to simulate an emergency evacuation, tell the pax to take their carry-on with them, and still see if they can meet the 90 sec rules.